Article
Chemistry, Multidisciplinary
Mei Wen, Nuo Yu, Zhigao Yi, Pu Qiu, Cheng Tao, Daniel K. Macharia, Meifang Zhu, Zhigang Chen, Xiaogang Liu
Summary: Conventional photo/sonosensitizers lack selectivity and cause severe skin and retina phototoxicity. The use of a copper-hematoporphyrin monomethyl ether nanoframework (CuHF) can suppress fluorescence on healthy tissues and prevent phototoxicity to the skin and eyes. In addition, this nanoframework can react with endogenous hydrogen sulfide in colon cancer cells, enabling simultaneous photothermal and sonodynamic therapies.
Article
Chemistry, Multidisciplinary
Laura Marin-Caba, Gustavo Bodelon, Yoel Negrin-Montecelo, Miguel A. Correa-Duarte
Summary: Research using nanostructured materials for bacterial photoinactivation shows that AuNRs/TiO2 photocatalytic composites exhibit photodegradation of rhodamine B, ROS production, photocatalytic inactivation of protein function in bacterial biofilms, and strong antimicrobial activity under simulated sunlight irradiation.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Microbiology
Vineet Dubey, Rinki Gupta, Ranjana Pathania
Summary: In the study, it was found that treatment with the last-resort antibiotic polymyxin B caused continuous variations in tolerance among different clinical isolates of Acinetobacter baumannii. The activity of superoxide dismutase (sodB) was identified as a major contributor to the tolerance of A. baumannii to polymyxin B. Rifampicin was effective in eradicating polymyxin B-induced A. baumannii persisters by increasing the generation of reactive oxygen species (ROS), which was linked to significant downregulation of sodB. The combination of polymyxin B and rifampicin was proposed as an effective antipersister strategy in clearing polymyxin B-induced A. baumannii persisters.
ANTIMICROBIAL AGENTS AND CHEMOTHERAPY
(2021)
Review
Chemistry, Inorganic & Nuclear
Nahyun Kwon, Dayeh Kim, K. M. K. Swamy, Juyoung Yoon
Summary: Reactive oxygen species (ROS) and reactive nitrogen species (RNS) play crucial roles in human life, but overproduction can lead to cell damage and diseases. Researchers have developed fluorescent and luminescent probes based on metal-coordinated systems to detect and image these active species, providing valuable tools for studying their roles in signaling and pathology.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Chemistry, Inorganic & Nuclear
Junli Zhou, Liqian Liu, Yite Li, Lei Wang, Zhigang Xie
Summary: In this study, a nanoscale Ru-doped metal-organic framework Hf-Ru with framework-boosted photoactivities was prepared, showing superior performance in bioimaging and ROS generation compared to molecular agents. The enhanced cellular uptake and imaging capabilities of Hf-Ru nanocrystals were well demonstrated in vitro.
INORGANIC CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Joshua G. Hughes, David R. Chisholm, Andrew Whiting, John M. Girkin, Carrie A. Ambler
Summary: Reactive oxygen species (ROS) have dual effects in cells, playing important roles in cell signaling and defense, but also causing cell death and oxidative damage. Developing a method to image ROS has been a challenge for many years. In this study, a new fluorescence microscopy-based technique called Bullseye Analysis is reported, which allows visualization of the production and effects of ROS at a subcellular level. The technique was validated using ROS-reporter dyes and a ROS-inducing photosensitizer.
MICROSCOPY AND MICROANALYSIS
(2023)
Article
Engineering, Biomedical
Zhuangzhuang Zhang, Yang Pan, Ju-E Cun, Junhua Li, Zhaoyuan Guo, Qingqing Pan, Wenxia Gao, Yuji Pu, Kui Luo, Bin He
Summary: We developed a doxorubicin-incorporated iron coordination polymer nanoparticle (PCFD) for efficient chemo-chemodynamic cancer therapy by using a cinnamaldehyde-based reactive oxygen species (ROS)-replenishing organic ligand. This ligand can release cinnamaldehyde in response to ROS, supplementing intracellular H2O2 and depleting glutathione (GSH) through a thiol-Michael addition reaction. Together with doxorubicin-induced ROS upregulation and Fe3+-enabled GSH depletion, it facilitates efficient doxorubicin release and enhanced Fenton reaction, leading to redox dyshomeostasis and cancer cell death through concurrent apoptosis-ferroptosis. In vitro and in vivo studies show that the ROS-replenishing PCFD exhibits a better anticancer effect compared to the ROS-consuming counterpart. This study provides a facile and straightforward strategy for designing ROS amplifying nanoplatforms for cancer treatment.
ACTA BIOMATERIALIA
(2022)
Article
Nanoscience & Nanotechnology
Han Yu, Chenglong Huang, Xiangjia Kong, Jun Ma, Peng Ren, Jiayi Chen, Xinyu Zhang, Huanhuan Luo, Gang Chen
Summary: In this study, cartilage-targeting hydrogel microspheres with ROS-responsive ability were developed using a combination of microfluidic and photopolymerization processes. These microspheres showed better retention in the joint cavity and enhanced cellular uptake of nanoparticles. The ROS-responsive nanoparticles could react with intracellular ROS induced by OA, leading to effective OA therapy.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Review
Pharmacology & Pharmacy
Robert Musiol, Patryk Malecki, Marcin Pacholczyk, Jacek Mularski
Summary: This review focuses on the anticancer activity of terpyridines as free ligands, highlighting their potential similarity or even higher anticancer potency compared to their transition metal complexes. Mechanistic analysis can provide valuable information for drug design.
EXPERT OPINION ON DRUG DISCOVERY
(2022)
Article
Biochemistry & Molecular Biology
Dorian M. Cheff, Qing Cheng, Hui Guo, Jameson Travers, Carleen Klumpp-Thomas, Min Shen, Elias S. J. Arner, Matthew D. Hall
Summary: Selenoprotein glutathione peroxidases (GPX) have antioxidant activities by reducing hydroperoxides using glutathione. Overexpression of GPXs is common in cancer and associated with chemotherapy resistance. Inhibitors of GPX1 and GPX4 have potential as anti-cancer agents, and targeting other GPX isoforms may be beneficial. The development of direct GPX inhibitors through screening could be valuable.
Article
Nanoscience & Nanotechnology
Anqi Liu, Chunjing Liang, Ji Liu, Yifei Huang, Ming Wang, Liqiang Wang
Summary: This study reports the design of a novel ROS-responsive lipid nanoparticle for enhanced RNAi in CNV treatment. The lipid nanoparticles efficiently deliver siRNA into cells and release siRNA in response to the upregulated ROS in CNV.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Biochemistry & Molecular Biology
Yihong Yang, Kunlun Chen, Guangdi Wang, Hongwu Liu, Lihui Shao, Xiang Zhou, Liwei Liu, Song Yang
Summary: Developing new agricultural bactericides is a feasible strategy for preventing the increase in resistance of plant pathogenic bacteria. In this study, pentacyclic triterpene acid derivatives were synthesized and compound A(22) showed the best antimicrobial activity against Xanthomonas oryzae pv. oryzae (Xoo) and Xanthomonas axonopodis pv. citri (Xac). The antimicrobial mechanism of A(22) was also investigated.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
In Young Kim, Tae Geol Lee, Vytas Reipa, Min Beom Heo
Summary: TiO2 NPs induce caspase-dependent apoptosis, reactive oxygen species generation, and lysosomal membrane permeabilization in HaCaT cells under UVA irradiation, suggesting that LMP-dependent oxidative stress plays a critical role in the UVA phototoxicity of TiO2 NPs in HaCaT cells. The cytotoxicity of TiO2 NPs is not significant without UVA irradiation.
Article
Biotechnology & Applied Microbiology
Bosong Zhang, Yufang Zhao, Kai Guo, Hui Tian, Cao Wang, Ruiqi Wang, Yue Chen, Xiongbiao Chen, Hongxia Zheng, Bingxin Gao, Jieyi Shen, Weiming Tian
Summary: Prevention and early intervention are crucial in treating Alzheimer's disease (AD). This study investigates the use of nanoparticles composed of resveratrol and oligomeric proanthocyanidin grafted with hyaluronic acid to address the issue of ROS accumulation in early AD. The results demonstrate that these nanoparticles are effective in scavenging ROS, reducing brain inflammation, and improving cognitive function in AD mice.
BIOENGINEERING & TRANSLATIONAL MEDICINE
(2023)
Article
Chemistry, Medicinal
Peng-Li Zhang, Mouna Hind Laiche, Yan-Liang Li, Wei-Wei Gao, Jian-Mei Lin, Cheng-He Zhou
Summary: Constructing a new antibacterial framework is an effective strategy against drug resistance. This study discovered a novel class of potential broad-spectrum antibacterial agents, called NIOLs. These active compounds showed high selectivity towards bacterial membranes and could effectively inhibit bacterial growth by disrupting the membranes, interfering with the antioxidant defense systems, and eradicating strains within biofilms. Furthermore, they exhibited low cytotoxicity. These findings provide a hopeful solution for combating drug resistance.
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
(2022)
Article
Biochemical Research Methods
Patrick Severin Sfragano, Serena Laschi, Lapo Renai, Michelangelo Fichera, Massimo Del Bubba, Ilaria Palchetti
Summary: The article introduces a new method of using biochar derived from biological sludge to prepare a carbon paste electrode and investigates its physicochemical properties. The experimental results show that biochar can be a promising material for electroanalytical sensors.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2022)
Review
Biochemical Research Methods
Patrick Severin Sfragano, Serena Pillozzi, Gerolama Condorelli, Ilaria Palchetti
Summary: In order to address cancer-related issues, the biosensing field is constantly searching for new biomarkers that can be non-invasively analyzed. Extracellular vesicles (EVs) have emerged as promising biomarkers that can provide direct information on diseases. However, there is a lack of practical and effective quantitative procedures for EV detection due to difficulties in the pre-analytical and analytical phases. This review aims to provide a comprehensive overview of recent progress in EV detection using electrochemical and photoelectrochemical biosensors.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Margherita Verrucchi, Gina Elena Giacomazzo, Patrick Severin Sfragano, Serena Laschi, Luca Conti, Marco Pagliai, Cristina Gellini, Marilena Ricci, Enrico Ravera, Barbara Valtancoli, Claudia Giorgi, Ilaria Palchetti
Summary: A water-soluble ruthenium(II) complex (L) was used to modify the surface of an indium-tin oxide (ITO) electrode decorated with a nanostructured layer of TiO2 (TiO2/ITO). Singlet oxygen (O-1(2)) produced by the complex under visible light irradiation triggers a cathodic photocurrent when the electrode is illuminated and biased at a proper reduction potential. The L/TiO2/ITO electrode was characterized and demonstrated efficient oxidation of phenolic compounds, with a limit of detection (LOD) of 0.3 mu mol dm(-3).
Article
Chemistry, Multidisciplinary
Emil M. H. Larsen, Niels A. Bonde, Hogni Weihe, Jacques Ollivier, Tom Vosch, Thomas Lohmiller, Karsten Holldack, Alexander Schnegg, Mauro Perfetti, Jesper Bendix
Summary: This study reports the different magnetic exchange interactions between metal dimers and metal monomers. The existence of magnetic exchange interactions is related to the d(8)...d(8) metallophilic interaction between the filled Pt2+ 5d(z)(2) orbitals. Furthermore, this study experimentally confirms the influence of different metal bridges on magnetic coupling and presents a computational model for palladium metallophilic interactions.
Article
Chemistry, Multidisciplinary
Alessandro Chiesa, Alberto Privitera, Emilio Macaluso, Matteo Mannini, Robert Bittl, Ron Naaman, Michael R. Wasielewski, Roberta Sessoli, Stefano Carretta
Summary: Molecular spins are potential building blocks for future quantum technologies due to the flexibility provided by chemistry. However, their weak interaction with external stimuli makes it difficult to access their state at the single-molecule level. A solution using the chirality-induced spin selectivity effect on electron transfer processes is envisioned, which enables initialization, manipulation, and single-spin readout of molecular qubits and qudits even at relatively high temperatures.
ADVANCED MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Gina Elena Giacomazzo, Daniele Paderni, Luca Giorgi, Mauro Formica, Lorenzo Mari, Riccardo Montis, Luca Conti, Eleonora Macedi, Barbara Valtancoli, Claudia Giorgi, Vieri Fusi
Summary: In this study, new molecules L1 and L2 containing a biphenol unit inserted into a macrocyclic polyamine fragment were synthesized. The acid-base and Zn(II)-binding properties of L1 and L2 were investigated, and they showed potential as chemosensors of H+ and Zn(II). L1 and L2 could form stable Zn(II) complexes, which could be used as metallo-receptors for external guests. The fluorescence studies revealed the potential of L1-Zn(II) complex as a sensor for the presence of AMPA.
Article
Environmental Sciences
Tania Martellini, Alessandro Russo, Alessandra Cincinelli, Saul Santini, Cristiana Lofrumento, Matteo Baini, Samuele Ciattini, Luca Conti, Francesca Mostardini, Luca Mercatelli, Alberto Ugolini
Summary: This study investigated the effects of two commonly used bioplastics on T. saltator and found that the ingestion of bioplastics can have an impact on supralittoral arthropods, even in the absence of bacterial biofilm.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Physical
Yiwen Wang, Joel Luke, Alberto Privitera, Nicolas Rolland, Chiara Labanti, Giacomo Londi, Vincent Lemaur, Daniel T. W. Toolan, Alexander J. Sneyd, Soyeong Jeong, Deping Qian, Yoann Olivier, Lorenzo Sorace, Ji-Seon Kim, David Beljonne, Zhe Li, Alexander J. Gillett
Summary: The poor operational stability of non-fullerene electron acceptor (NFA) organic solar cells (OSCs) currently limits their commercial application. While previous studies have primarily focused on the degradation of the NFA component, we also consider here the electron donor material. We find that twisting in the benzo[1,2-b:4,5-b0]dithiophene (BDT)-thiophene motif shared by PM6 and D18 leads to enhanced conversion of singlet excitons into trapped interchain polaron pairs, reducing the charge generation yield. However, the absence of this pathway in PTQ10 results in improved stability. Therefore, addressing the stability of the donor polymer is essential in conjunction with the NFA for improving OSC stability.
Article
Chemistry, Multidisciplinary
Davide Ranieri, Alberto Privitera, Fabio Santanni, Karolina Urbanska, Grant J. Strachan, Brendan Twamley, Enrico Salvadori, Yu-Kai Liao, Mario Chiesa, Mathias O. Senge, Federico Totti, Lorenzo Sorace, Roberta Sessoli
Summary: By synthesizing and studying a VIVO-CuII porphyrin dimer, we observed measurable exchange coupling and good spin coherence, making it suitable for operating two-qubit molecular spin-based quantum gates under various conditions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Alberto Privitera, Davide Faccio, Demetra Giuri, Elisabeth I. Latawiec, Damiano Genovese, Francesco Tassinari, Liviana Mummolo, Mario Chiesa, Claudio Fontanesi, Enrico Salvadori, Andrea Cornia, Michael R. Wasielewski, Claudia Tomasini, Roberta Sessoli
Summary: This study reports an attempt to detect CISS at the molecular level by linking pyrene electron donor to fullerene acceptor with chiral peptide bridges. Despite no evidence of electron transfer being found, the multi-technique analysis provides guidelines for designing chiral organic model systems suitable for detecting CISS-polarized ET. The direct spectroscopic detection of CISS effect can help understand the complex relationship between chirality and electron spin.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Review
Chemistry, Inorganic & Nuclear
Arsen Raza, Mauro Perfetti
Summary: Chemical guidelines that target a well-defined electronic structure and magnetic anisotropy play a crucial role in physics, chemistry, and biology. Our literature overview emphasizes that manipulating the energy gap between the ground and first excited state and customizing the magnetic anisotropy of paramagnetic molecules serve as excellent starting points for enhancing the performance of various molecular materials with emerging technological properties. These materials include Single Molecule Magnets, Pseudo Contact Shift agents, Optically Addressable Qubits, Magnetic Refrigerants, and Magnetic Anisotropy Switches. Furthermore, we discuss the compatibility between different functionalities.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Chemistry, Inorganic & Nuclear
Gina Elena Giacomazzo, Michele Schlich, Luca Casula, Luciano Galantini, Alessandra Del Giudice, Giangaetano Pietraperzia, Chiara Sinico, Francesca Cencetti, Sara Pecchioli, Barbara Valtancoli, Luca Conti, Sergio Murgia, Claudia Giorgi
Summary: Ru(II) polypyridyl complexes (RPCs) that utilize the dppn ligand have shown promising singlet oxygen sensitization properties in photodynamic therapy (PDT). This study synthesized two new RPCs and encapsulated them in cubosomes, demonstrating improved biopharmaceutical properties and PDT efficacy.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Materials Science, Multidisciplinary
Chiara Ingrosso, Michela Corricelli, Anna Testolin, Valentina Pifferi, Francesca Bettazzi, Giuseppe V. Bianco, Nicoletta Depalo, Elisabetta Fanizza, Marinella Striccoli, Ilaria Palchetti, M. Lucia Curri, Luigi Falciola
Summary: A novel colloidal hybrid nanocomposite has been synthesized through a facile and cost-effective in situ colloidal procedure. The nanocomposite exhibits good dispersibility and high electrical conductivity, and shows superior performance in the detection of biomarkers such as dopamine. It holds great potential for medical applications.
MATERIALS ADVANCES
(2023)